When the little sloppy calculated 400-□/5, he did the subtraction first, and the result was 30. What should be the correct result?
小马虎在计算400-□/5时，先算了减法，结果是30，正确的结果应该是多少．
<gadget id="calculator">30 * 5</gadget>
<output>150</output>

<gadget id="calculator">400 - 150</gadget>
<output>250</output>

<gadget id="calculator">250 / 5</gadget>
<output>50</output>

<gadget id="calculator">400 - 50</gadget>
<output>350</output>

<result>350</result>