Demo for iPad: Visualisation of Fraction Multiplication

Author:
tzunfung
1. Change the values of the numerators a, c and denominators b, d by moving the sliders to get different fractions 2. Slide to visualise the multiplication of the two fractions 3. Click the checkbox to show the answers
Note: 1. Modified based on CEMTL resources; 2. There's problem in displaying LaTex text input on iPad; but simple texts are fine.