4×4/9×4=16/36
2.2×3/17×3=6/51
3.4×4/19×4=16/76
4.13×7/15×7=91/105
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4×4/9×4=16/36
2.2×3/17×3=6/51
3.4×4/19×4=16/76
4.13×7/15×7=91/105