It is known that Xiaoming's weight is 40 kilograms, and Lili's weight is lighter than Xiaoming's (1/20), how much is Lili's weight in kilograms?
已知小明的体重是40千克，丽丽的体重比小明轻(1/20)，丽丽的体重是多少千克？
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">40 * (19/20)</gadget>
<output>38</output>

<result>38</result>