Try this problem sum.. it's PRIMARY 4 MATH!!

A x B = Z
If A is increased by 6 & B remains unchanged, then Z will increase by 66.
If B is increased by 6 & A remains unchanged, then Z will increase by 72.
What is the original value of Z???

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Oh well i had been crackin my brain juz to solve tis problem sum.. but didn't manage to solve it before tuition ended.. n yet my tuition gal nd to submit to teacher tml.. so i told myself no matter wat i gonna solve it otherwise it's so embarassing.. i told her before 11pm tonight i would give her a call to get bck to her of tat sum.. surprisingly as i boarded the bus on the way home, ideas came in n finally i managed to solve it!! i wanted to call her but my fone batt was flat.. n i got to make it be4 11pm so i rushed to the station n spent total of 40cents using public phone to explain to her.. Now i got the ans, can u? quick!! take paper n pen out n try to solve tis!!
Do share with me if u manage to solve or if u nd help, feel free to look for me..
Have fun!!

It's realli not easy being student nowadays..