Calculation: 3.8: how much=0.3/(3/8)=((())/20)=(20/(())).
计算：3.8：多少=0.3/(3/8)=((())/20)=(20/(()))．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">0.3 / (3/8)</gadget>
<output>0.8</output>

<gadget id="calculator">1 / 0.8</gadget>
<output>1.25</output>

<gadget id="calculator">3.8 * 1.25</gadget>
<output>4.75</output>

<result>4.75</result>