A cube-shaped fishbowl with an edge length of 20 centimeters (cm) was filled with water up to 15 centimeters (cm) high. Here, a cube-shaped piece of iron whose edge is 10 centimeters (cm) long was placed to be completely submerged in the water. Find how many centimeters (cm) the water level in this fish tank has risen, including the decimal point.
10 10 [OP_MUL] 10 [OP_MUL] 20 20 [OP_MUL] [OP_DIV]
var_a = 10
var_b = 10
var_c = var_a * var_b
var_d = 10
var_e = var_c * var_d
var_f = 20
var_g = 20
var_h = var_f * var_g
var_i = var_e / var_h
print('{:.2f}'.format(round(var_i+1e-10,2)))