The number A is (4/3) of the number B, then how much less the number B is than the number A.
甲数是乙数的(4/3)，那么乙数比甲数少多少．
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(4/3) - 1</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) / (4/3)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>