Compute .
Choose a strategy suited to the numbers. Long multiplication of by means five partial products. Because is close to , the compensation method is far quicker: .
Apply the distributive law.
Compute the small correction. , so shifting two decimal places gives
Subtract. Pad the first number to six decimals () before subtracting so the columns line up.
Check the decimal-place count. has decimals and has , so the exact product must have : . The digit count confirms nothing was dropped.
Estimate to be safe. is a little over , and , so a result slightly above is expected - fits.
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