Assuming the 6 is the underlined digit, it is in the "hundred millions" place. Its place value there is 600,000,000. That's six hundred million.
If 7 is the underlined digit, it is in the "ten millions" place. Its place value there is 70,000,000. That's seventy million.
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The place value of a digit is revealed by setting all the other digits to zero.
