What is the difference between 76 plus the product of 28 times 23 and subtracting 220?
76加上28乘以23的积，再减去220，差是多少．
<gadget id="calculator">28 * 23</gadget>
<output>644</output>

<gadget id="calculator">644 - 220</gadget>
<output>424</output>

<gadget id="calculator">76 + 424</gadget>
<output>500</output>

<result>500</result>