Calculate with a simple method: 102*35+98*42.
用简便方法计算：102*35+98*42．
<gadget id="calculator">102 * 35</gadget>
<output>3_570</output>

<gadget id="calculator">98 * 42</gadget>
<output>4_116</output>

<gadget id="calculator">3_570 + 4_116</gadget>
<output>7_686</output>

<result>7_686</result>