Sure, it's pretty easy, but considering the fact that your daughter is in Year 7, your only working method would be trial and error.
I got it at the second try.
I tried
10 + 5 + 4 = 19, but...
10 x 5 x 4 = 200.
Hence, what you must do is variate the numbers, like for example, remove one from 10 and add it to 5.
9 + 6 + 4 = 19, and...
9 x 6 x 4 = 216.
Hope I helped!
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