7/10 of the water remains in the 10 liter (L) bucket. How many liters (liters) of water do you need to fill in one bottle to divide the remaining water equally into 4 bottles?
10 7/10 [OP_MUL] 4 [OP_DIV]
var_a = 10
var_b = 0.7
var_c = var_a * var_b
var_d = 4
var_e = var_c / var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))