An artist uses 3 ounces of paint for every large canvas they cover, and 2 ounces of paint for every small canvas they cover.  They have completed 3 large paintings and 4 small paintings.  How many ounces of paint have they used?
The large paintings have used 3 * 3 = <<3*3=9>>9 ounces.
The small paintings have used 2 * 4 = <<2*4=8>>8 ounces.
In total, all the paintings have used 9 + 8 = <<9+8=17>>17 ounces.
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