Evaluate
3\sqrt{7}+413.5\approx 421.437253933
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9+11\times 6^{2}+8.5+\sqrt{63}
Multiply 3 and 3 to get 9.
9+11\times 36+8.5+\sqrt{63}
Calculate 6 to the power of 2 and get 36.
9+396+8.5+\sqrt{63}
Multiply 11 and 36 to get 396.
405+8.5+\sqrt{63}
Add 9 and 396 to get 405.
413.5+\sqrt{63}
Add 405 and 8.5 to get 413.5.
413.5+3\sqrt{7}
Factor 63=3^{2}\times 7. Rewrite the square root of the product \sqrt{3^{2}\times 7} as the product of square roots \sqrt{3^{2}}\sqrt{7}. Take the square root of 3^{2}.
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