[(2+4+..........+700)*189]:[(4+8+......+360)*39]=
=[2(1+2+..........+350)*189]:[4(1+2+......+90)*39]=
=(2*350*351/2*189):(4*90*91/2*39)=
=(350*351*189):(180*91*39)=
=(35*351*189):(18*91*39)=
351:39=9
=(35*27):(2*13)=
189:7=27 91:7=13
=945/23=36,34(615384)
(6+12+...+258):(3+6+....+129)=
=6(1+2+...+43):3(1+2+....+43)=
=6:3=2