When sloppy calculated 120-□*5, he made a mistake in the order of operations, and the result was 500. What is the correct number for this question.
马虎在计算120-□*5时，把运算顺序弄错了，结果得到500．这道题的正确得数是多少．
<gadget id="calculator">500 / 5</gadget>
<output>100</output>

<gadget id="calculator">120 - 100</gadget>
<output>20</output>

<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<result>20</result>