For anyone interested, you multiply and divide fixed point numbers with this code:
Code:
inline var fixmul(var r1,var r2)
{
	__asm {
		mov	eax,r1
		mov	edx,r2
		imul  edx
		shrd  eax,edx,10
		adc   eax,0
	}
}

inline var fixdiv(var dividend, var divisor)
{
	__asm {
		mov	eax,dividend
		mov	ecx,divisor
		mov   edx,eax
		sar   edx,22
		shl   eax,10
		idiv  ecx
	}
}