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1000000000 * 1000000001 * 1000000000 * 1000000001 | = 1.0000000020E+36 … | [1] | ||
/4 | ||||
mod\(\(1000000000\ *\ 1000000001\ *\ 1000000000\ *\ 1000000001\ \/\ 4\)\,\ 1000000007\) | ||||