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The fourth grade mathematics first volume mathematics expansion problem
4 7 3 2

× 3 9 9 1 ∕￣2￣9￣ 1￣9￣

────────── 2 7 3

4 3 3 ───────────

1 4 1 1 8 9

───────── 1 8 2

1 8 4 3 ────────────

seven

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