Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d58573c02a0667f9ececf2dacf8ec7d836c6cad2b346d5983a120cf8c0ddd094:13:8
   |
13 |         let f1 = fee * I1B2sqr / scale * I2B1sqr / scale - I1B2;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^