999999乘以999999加1999999等于多少啊?

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999999乘以999999加1999999等于多少啊?
999999乘以999999加1999999等于多少啊?

999999乘以999999加1999999等于多少啊?
9999999*9999999+1999999
=(10^6-1)^2+1999999
=10^12-2*10^6+1+19999999
=10^12-2*10^6+2*10^6
=10^12

999999*999999+1999999
=999998000001+1999999
=1000000000000

1,000,000,000,000

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