Subtract the product of 40 times 78 from 3440, divide the difference by 8, what is the result?
3440减去40乘78的积，所得的差再除以8，结果是多少？
<gadget id="calculator">40 * 78</gadget>
<output>3_120</output>

<gadget id="calculator">3_440 - 3_120</gadget>
<output>320</output>

<gadget id="calculator">320 / 8</gadget>
<output>40</output>

<result>40</result>