What is the product of the difference between 98 and 82 times the sum of 15 and 25?
98与82的差乘15与25的和，积是多少？
<gadget id="calculator">98 - 82</gadget>
<output>16</output>

<gadget id="calculator">15 + 25</gadget>
<output>40</output>

<gadget id="calculator">16 * 40</gadget>
<output>640</output>

<result>640</result>