What is the formula of 545-275=270 that cannot be checked below?
下面不能验算545-275=270的算式是多少
<gadget id="calculator">545 - 275</gadget>
<output>270</output>

<gadget id="calculator">270 - 270</gadget>
<output>0</output>

<gadget id="calculator">275 + 0</gadget>
<output>275</output>

<gadget id="calculator">270 - 275</gadget>
<output>-5</output>

<gadget id="calculator">275 + (-5)</gadget>
<output>270</output>

<gadget id="calculator">275 - 270</gadget>
<output>5</output>

<result>5</result>