Write each place value from the word form as digits, then combine.<br><br>
&bull; Thousands: Sixty-three thousand = 63 × 1 000 = 63000<br>
&bull; Hundreds: four hundred = 400<br>
&bull; Tens and ones: seven = 7<br>
&bull; Combine: 63000 + 400 + 7 = 63407<br>
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Final Answer: 63407