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+; function to do multiplication
+; all values are big endian
+; INPUT
+; FF96-FF98 =  multiplicand
+; FF99 = multiplier
+; OUTPUT
+; FF95-FF98 = product
+Multiply::
+	push hl
+	push bc
+	callfar _Multiply
+	pop bc
+	pop hl
+	ret
+
+; function to do division
+; all values are big endian
+; INPUT
+; FF95-FF98 = dividend
+; FF99 = divisor
+; b = number of bytes in the dividend (starting from FF95)
+; OUTPUT
+; FF95-FF98 = quotient
+; FF99 = remainder
+Divide::
+	push hl
+	push de
+	push bc
+	homecall _Divide
+	pop bc
+	pop de
+	pop hl
+	ret