A toy doctor's hat, the top is a square with a side length of 7 cm, and the bottom is a cylinder with a base diameter of 4 cm and a height of 3 cm. What is the surface area of this doctor's hat?
一个玩具博士帽，上面是边长7厘米的正方形，下面是底面直径4厘米，高3厘米的圆柱．求这个博士帽的表面积是多少？
<gadget id="calculator">7 * 7</gadget>
<output>49</output>

<gadget id="calculator">3.14 * 4 * 3</gadget>
<output>37.68</output>

<gadget id="calculator">49 + 37.68</gadget>
<output>86.68</output>

<result>86.68</result>