You need a significantly more complicated circuit.
As I understand your circuit, it is counting up in 1s, so 1, 2, 3, 4, 5 etc, but blanking the display on the odd numbers so that it is only the even numbers that are shown. If you used the same approach to show the multiples of higher numbers, the display would be off for most of the time.
You are looking for a circuit that produces a fixed number of pulses each time the display is blanked. I suggest a 4017. The clock frequency for that should be much higher than the blanking frequency. The idea is that each time the display turns off, the 4017 is reset. The 4017 counts up until it is stopped. It is stopped when one of its outputs goes high, and that output is connected to a device that turns off the clock input to the 4017. An OR gate should work for that.
As the 4017 has a separate output for each value, you can set the multiplication value with a simple switch connecting any one of the outputs to the device the turns off the clock input.
Or use a microcontroller.
Or film the whole 0 - 99 sequence on the video and edit it to give the values you want.