9^9 = 387.420.489
I | 387.420.489 * 9 = 3.486.784.401
II | 3.486.784.401 * 9 = 31.381.059.609
III | 31.381.059.609 * 9 = 282.429.536.481
IV | 282.429.536.481 * 9 = 2.541.865.828.329
V | 2.541.865.828.329 * 9 = 22 876 792 454 961
VI | 22 876 792 454 961 * 9 = 205.891.132.094.649
VII | 205.891.132.094.649 * 9 = 1.853.020.188.851.841
IIX| 1.853.020.188.851.841 * 9 = 16.677.181.699.666.569
IX | 16.677.181.699.666.569 * 9 = 150.094.635.296.999.121
Also 9^(9^9) = 150.094.635.296.999.121