What is the formula that cannot be checked for 700-500
不能给700-500验算的算式是多少
<gadget id="calculator">700 - 500</gadget>
<output>200</output>

<gadget id="calculator">500 - 200</gadget>
<output>300</output>

<gadget id="calculator">200 + 500 + 200 + 300</gadget>
<output>1_200</output>

<result>1_200</result>