What is the difference between the sum of 250 and 350 minus the product of 13 and 26?
250与350的和减去13与26的积，差是多少？
<gadget id="calculator">250 + 350</gadget>
<output>600</output>

<gadget id="calculator">13 * 26</gadget>
<output>338</output>

<gadget id="calculator">600 - 338</gadget>
<output>262</output>

<result>262</result>