What is the product of the sum of 16 and 24 times the half of the sum of 725 and 275?
16与24的和乘725与275的和的一半，积是多少？
<gadget id="calculator">725 + 275</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 / 2</gadget>
<output>500</output>

<gadget id="calculator">16 + 24</gadget>
<output>40</output>

<gadget id="calculator">500 * 40</gadget>
<output>20_000</output>

<result>20_000</result>