The length of one span of Jinseo is about 12 centimeters (cm). When Jinseo measured the length of the shorter side of the bookshelf, it was about two spans. How many centimeters (cm) is the short side of the bookshelf?
12 2 [OP_MUL]
var_a = 12
var_b = 2
var_c = var_a * var_b
print(int(var_c))