The number of A is 7.3, which is 3.4 times more than the number of B, find the number of B.
甲数是7.3，比乙数的3倍多3.4，求乙数．
<gadget id="calculator">7.3 - 3.4</gadget>
<output>3.9</output>

<gadget id="calculator">3.9 / 3</gadget>
<output>1.3</output>

<result>1.3</result>