Answer:
836
Explanation:
If you have one topping, one cone, and I ice cream flavor.
We need to find the possible result in each item
-In 19 cones, if we just choóe 1 out of them, our possible results ;19
- In 11 cones, if we just choóe 1 out of them, our possible results: 11
- In 4 toppings, if we just choóe 1 out of them, our possible results: 4
After that, we multiple the three items together : 9 *11* 4 = 836 different ice-cream.