Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 87e65d0a2eabce780479f471c258a9f9dea0e30b7ec5b32a47b6d6026f57b3a2:13:8
   |
13 |         let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I1B2;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^