There are 40 corn seeds, the germination rate is 95%, how many of them do not germinate.
有40粒玉米种子，发芽率是95%，不发芽的有多少粒．
<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

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

<gadget id="calculator">40 - 38</gadget>
<output>2</output>

<result>2</result>