On the twentieth level, there is another test to determine who may continue to climb the tower. Many who have failed and buried their dreams gather there. However, Ja Wangnan does not want to give up and puts everything on one last chance.
How? You couldn't pay it back working 
a hundred years in a normal job.
‫كيف؟ لا يمكنك سدادها حتى لو
‫عملت مائة عام في وظيفة عادية.
Und wie? In hundert Jahren ehrlicher
Arbeit würdest du nicht genug verdienen.
Et comment ?
E come potresti? Con un lavoro normale, 
non ti basterebbero neanche cento anni.
Como fará isso? Nem em cem anos
você conseguiria pagar com um trabalho normal.
Каким образом?