Number A has as much (3/7) as Number B. Number A is 0.28. What is the number B?
甲数的(3/7)与乙数同样多，甲数是0.28，乙数是多少．
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">0.28 * (3/7)</gadget>
<output>0.12</output>

<result>0.12</result>