There are 960 parts in a batch, and two workers A and B can complete it in 5 hours. It is known that the speed of worker A is twice the speed of worker B, how much less can worker B do per hour than worker A?
一批零件有960个，甲乙两个工人同做5小时能完成．已知甲工人的速度是乙工人速度的2倍，求乙工人每小时比甲工人少做多少个？
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">960 / 5 / 3</gadget>
<output>64</output>

<gadget id="calculator">2 * 64</gadget>
<output>128</output>

<gadget id="calculator">128 - 64</gadget>
<output>64</output>

<result>64</result>