What is the difference between multiplying 906 by 24 and subtracting 906?
906乘以24的积，再减去906，差是多少？
<gadget id="calculator">906 * 24</gadget>
<output>21_744</output>

<gadget id="calculator">21_744 - 906</gadget>
<output>20_838</output>

<result>20_838</result>