Calculate with a simple method: 63*37+63*63.
用简便方法计算：63*37+63*63．
<gadget id="calculator">63 * 37</gadget>
<output>2_331</output>

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

<gadget id="calculator">2_331 + 3_969</gadget>
<output>6_300</output>

<result>6_300</result>