It is known that a▲b=a**2+3b, for example 4▲1=4**2+3*1=19, ..., calculation: 5▲4.
已知a▲b=a**2+3b，例如4▲1=4**2+3*1=19，…，计算：5▲4．
<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">25 + 12</gadget>
<output>37</output>

<result>37</result>