Explicație pas cu pas:
100+99+98+97+96+95+94+93+92+91+89+88+87+86+85+84+83+82+81+80+79+78+77+76+75+74+73+72+71+70+69+68+67+66+65+64+63+62+61+60+59+57+56+55+54+53+52+51+50+49+48+47+46+45+44+43+42+41+40+39+38+37+36+35+34+33+32+31+30+29+28+27+26+25+24+23+22+21+20+19+18+17+16+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1+ egal cu 15534439
1.890 1.380.89 2.338.89 2.344.39
