The number of A is 19, the number of B is 4 times more than the number of A, and the number of B is more than the number of A.
甲数是19，乙数比甲数的4倍多4，乙数比甲数多多少．
<gadget id="calculator">19 * 4</gadget>
<output>76</output>

<gadget id="calculator">4 - 19</gadget>
<output>-15</output>

<gadget id="calculator">76 + (-15)</gadget>
<output>61</output>

<result>61</result>