A batch of parts is processed, A takes 8 hours to finish, B takes 5 hours to finish, how much more time A takes than B.
加工一批零件，甲用8小时完成，乙用5小时完成，甲所用的时间比乙多多少．
<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>