# RuntimeError: mat1 and mat2 shapes cannot be multiplied (64x13056 and 153600x2048)

**URL:** <https://discuss.pytorch.org/t/runtimeerror-mat1-and-mat2-shapes-cannot-be-multiplied-64x13056-and-153600x2048/101315>\
**Category:** Uncategorized\
**Created:** [November 2, 2020, 4:51am UTC](https://discuss.pytorch.org/t/runtimeerror-mat1-and-mat2-shapes-cannot-be-multiplied-64x13056-and-153600x2048/101315 "2020-11-02T04:51:32Z")\
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**Showing post:** 6

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**Author:** ![darnoceloc](https://discuss.pytorch.org/user_avatar/discuss.pytorch.org/darnoceloc/32/32202_2.png) [@darnoceloc](https://discuss.pytorch.org/u/darnoceloc)\
**Post date:** [December 11, 2020, 6:51am UTC](https://discuss.pytorch.org/t/runtimeerror-mat1-and-mat2-shapes-cannot-be-multiplied-64x13056-and-153600x2048/101315/6 "2020-12-11T06:51:27Z")

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I’m getting RuntimeError: mat1 and mat2 shapes cannot be multiplied (836x35344 and 836x35344).

```auto
class Net(nn.Module):
    def __init__ (self):
        super(Net, self). __init__ ()
        self.conv1 = nn.Conv2d(3, 6, 5)
        self.pool = nn.MaxPool2d(2, 2)
        self.conv2 = nn.Conv2d(6, 16, 5)
        self.fc1 = nn.Linear(836, 16*47*47)
        self.fc2 = nn.Linear(120, 84)
        self.fc3 = nn.Linear(84, 10)

    def forward(self, x):
        x = self.pool(F.relu(self.conv1(x.float())))
        x = self.pool(F.relu(self.conv2(x.float())))
        x = x.view(836, 16 * 47 * 47)
        x = F.relu(self.fc1(x))
        x = F.relu(self.fc2(x))
        x = self.fc3(x)
        return x

```

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