164,994
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642 x 257 equals 165,294. To calculate this, you would multiply the units digits (2 x 7 = 14), carry over the 1, then calculate the tens digits (2 x 5 = 10, plus the carried over 1 = 11), carry over the 1 again, and finally calculate the hundreds digits (2 x 2 = 4, plus the carried over 1 = 5). This process is repeated for each place value to arrive at the final product.
1, 2, 257, 514:1 x 514, 2 x 257
10353 x 437 - 14 + 642 / 2 = 4524261 - 14 + 321 = 452768
It's 10.118 x 14.331 inches, or almost exactly 145 squareinches.
642 is closer to 600
0.0078