37*37+2*63*37+63*63=how much.
37*37+2*63*37+63*63=多少．
<gadget id="calculator">37 * 37</gadget>
<output>1_369</output>

<gadget id="calculator">2 * 63 * 37</gadget>
<output>4_662</output>

<gadget id="calculator">63 * 63</gadget>
<output>3_969</output>

<gadget id="calculator">1_369 + 4_662 + 3_969</gadget>
<output>10_000</output>

<result>10_000</result>