Three times the number A is 13 less than four times the number B. Given that the number B is 34, find the number A.
甲数的3倍比乙数的4倍少13，已知乙数为34，求甲数．
<gadget id="calculator">34 * 4</gadget>
<output>136</output>

<gadget id="calculator">136 - 13</gadget>
<output>123</output>

<gadget id="calculator">123 / 3</gadget>
<output>41</output>

<result>41</result>