Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 85534ca79100aa8435a91b480f65bbfc5ec68eea3e1ea4442c7ffedfc86344a9:13:8
   |
13 |         let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I1B2;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^