When the little sloppy calculated 140-□*5, he made a mistake in the order of operations, and the result was 600. What is the correct number for this question?
小马虎在计算140-□*5时，把运算顺序弄错，结果得到600，这道题的正确得数是多少？
<gadget id="calculator">140 * 5</gadget>
<output>700</output>

<gadget id="calculator">700 - 600</gadget>
<output>100</output>

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

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

<gadget id="calculator">140 - 100</gadget>
<output>40</output>

<result>40</result>