The sum of the three numbers is 248. Given that A:B=3:4, B:C=6:5, what is the number of A?
三个数的和为248，已知甲：乙=3：4，乙：丙=6：5，则甲数是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 + (3/4) + (5/6)</gadget>
<output>31/12 = around 2.583333</output>

<gadget id="calculator">248 / (31/12)</gadget>
<output>96</output>

<gadget id="calculator">(3/4) * 96</gadget>
<output>72</output>

<result>72</result>