$fX += $fY => 3.52 += 2.7   =>   $fX = 6.22
$fX -= $fY => 6.22 -= 2.7   =>   $fX = 3.52
$fX *= $fY => 3.52 *= 2.7   =>   $fX = 9.504
$fX /= $fY => 9.504 /= 2.7   =>   $fX = 3.52
$fX **= $fY => 3.52 **= 2.7   =>   $fX = 29.899587130207

$iA %= $iD => 32 %= 7   =>   $iA = 4