$a = bcmul(3.5, bcpow(10, 406));$b = bcmul(2.8, bcpow(10, 406));$a_squared = bcpow($a, 2);$b_squared = bcpow($b, 2);$hypotenuse = bcsqrt(bcadd($a_squared, $b_squared));print $hypotenuse;?>