What is the reciprocal of the least common multiple of 4 and 10?
4和10的最小公倍数的倒数是多少．
<gadget id="calculator">2 * 2 * 5</gadget>
<output>20</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>