Minsu runs 120 meters (m). Minsu says that he runs 4 meters (m) per second. If Minsu is 20 meters (m) away from the finish line, find how many seconds have elapsed since he ran.
120 20 [OP_SUB] 4 [OP_DIV]
var_a = 120
var_b = 20
var_c = var_a - var_b
var_d = 4
var_e = var_c / var_d
print(int(var_e))