You have 99 problems ?
Learn French.
Voilà, now you have
4, 20, 10, 9 problems
@tournesol No. Learn German.
If you speak English, you have 90*9 = 810 problems.
If you speak French, you have 4*20*19 = 1520 problems.
Only with German language you have 9 + 90 = 99 problems.
@tournesol Or Spanish: 90 + 9 = 99 problems.
@agrinova @tournesol What about Danish?