"\\text{If he works at an hour for \\ \\$10} \\\\\\\\\n\\text{He works seven hours a day} \\\\\\\\\n\\therefore \\text{ He gets \\$70} \\text{ a day} \\\\\\\\\n\\therefore \\text{The number of days he takes to get \\$22197000 } \\,is\\,\\frac{22197000}{70}=317100 \\text{ days}"
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