Simple calculation: 888888*777778+444444*4444444, what is the answer?
简便方法计算：888888*777778+444444*4444444，答案是多少．
<gadget id="calculator">888_888 * 777_778</gadget>
<output>691_357_530_864</output>

<gadget id="calculator">888_888 * 222_222</gadget>
<output>197_530_469_136</output>

<gadget id="calculator">691_357_530_864 + 197_530_469_136</gadget>
<output>888_888_000_000</output>

<result>888_888_000_000</result>