1 x 10 21 July 8, 2019 16 32 64 128 1 10 x 210 257 1 7 x 10 21 1 3 x 10 21 1 9 x 21 10 1 2 x 10 x 21 Dragon proguide x 1 10 213 1 3 6 10 x 21 28 1 10 21 x 15 3 4 1 x 10 to the power of 21 1 10 21 x 1 )+ 6 1 2 x 4 5 )= 21 10 1 4 x 10 puissance 21 219 7 x 1 )= 10 2
