Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 89da072faa42d2d34abc4cac86f62ef009d0fb0d1bab781b87a5804cfecbe19b:13:8
   |
13 |         let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I1B2;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^