hola
-2121 X N = R
-2121 X 1 = -2121
-2121 X 2 = -4242
-2121 X 3 = -6363
-2121 X 4 = -8484
-2121 X 5 = -10605
-2121 X 6 = -12726
-2121 X 7 = -14847
-2121 X 8 = -16968
-2121 X 9 = -19089
-2121 X 10 = -21210
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