The reciprocal of the number A is (5/8), the number B is (4/15) of the number A, what is the number B.
甲数的倒数是(5/8)，乙数是甲数的(4/15)，乙数是多少．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 / (5/8)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(8/5) * (4/15)</gadget>
<output>32/75 = around 0.426667</output>

<result>32/75 = around 0.426667</result>