Saying "into" instead of "times" when talking about multiplication

I'm studying a series on algorithms taught by "Abdul Bari" on youtube

Here is when he says "A into B" to talk about multiplying A by B

I know why some say "a times b" when talking about multiplication. I'm curious about the expression "a into b". Where might it come from?

Solution 1:

This is an archaism that survives in Indian English. When I learned the times tables in the 70s, this is how I did it: "1 into 1 is 1", "1 into 2 is 2" etc. We also were taught '4 by 2 is 2', with 'by' standing for division.

You can see 17th and 18th century references to this usage, e.g., 'for two into two is Four' (Henry More, 1712); 'for two into three is six' (Margaret Cavendish, 1668)

Meanwhile, you can see a similar use in a non-Indian example here.