TypeError: can't multiply sequence by non-int of type 'float'

[MafeBasso]

I get the error: TypeError: can't multiply sequence by non-int of type 'float'
On line 102 of scratch/neural_networks.py
https://github.com/joelgrus/data-science-from-scratch/blob/d5d0f117f41b3ccab3b07f1ee1fa21cfcf69afa1/scratch/neural_networks.py#L102C5-L103C67