App Android Studio.- Drawing of the result of multiplication of two numbers (area graphically), App & Source code

The app consists of two Activities / Screen, both do the same.
The first Activitie:
- Shows the area as a result of multiplying two positive integers graphically and their internal grids through the Move / Touch event of the SeekBar (Vertical / Horizontal), other types of controls can be used (customized), additionally it shows the values ​​selected by the user in the SeekBar dynamically in 2 TexView, shows the numerical result.
- You can do the above by pressing the Clear button (to return the SeekBars to zero) then entering the values ​​for X = (0 - 10) and Y = (0 - 14) by keyboard in the TextView, then pressing the Multiply button ( green) and then the result is displayed on the orange Cartesian axis with its grids (See attached)
- You can do the above by pressing the Clear button and then entering through Google's voice service (internet is needed) the values ​​of the TextViews and then pressing the Multiply button. (See attached)
The second Activitie
- The idea is the same to calculate the area, but this through the Move or Touch event (move a small circle that starts at point X = 0, Y = 0) within the Cartesian axis, when the user moves the circle, at each intersection The orange rectangle / square and their respective grids must be drawn from the axes. (See attached)

The app must have a Configuration option where the language is configured (for voice input) and an About us option (See attachment)