Answer: 121,716
Explanation:
We can show this equation like this: 644
* 189
---------
First you multiply all the top numbers with 9
It will look something like this: 644
* 189
----------
5796
Then you multiply all the top numbers by 8
Then it will look like this: 644
* 189
----------
5796
51520 <------- make sure to add a zero because you are multiplying top numbers with 80
189 = 100 + 80 + 9
After that, you multiply all the numbers by 1
Then it will look like this: 644
* 189
----------
5796
51520
64400 <------Remember to add two zeros this time because you are actually multiplying with 100
After you have multiplied all of that, all you have to do now is add all the numbers up
Then it will look like this: 644
* 189
----------
5796
51520
+ 64400
---------------------
121716
And that is how you get 121716 as your answer!