When the little sloppy was calculating the division, he mistook the divisor 45 as 54 and got the quotient of 15. Please help him to calculate the correct quotient.
小马虎在计算除法时，错将除数45看成54，结果得到商15，请你帮他算一算，正确的商应该是多少．
<gadget id="calculator">54 * 15</gadget>
<output>810</output>

<gadget id="calculator">810 / 45</gadget>
<output>18</output>

<result>18</result>