1101010 is kinda hard to read. It's very long and you have to do a lot of calculating to find out the actual number:
1 | 1 | 0 | 1 | 0 | 1 | 0 |
2^6=64 | 2^5=32 | 2^4=16 | 2^3=8 | 2^2=4 | 2^1=2 | 2^0=1 |
64 | 32 | 0 | 8 | 0 | 2 | 0 |
If we add this up we get 64 + 32 + 8 + 2 = 106. So 1101010 is 106 in decimal. Wow this took a long time (you might not even get it yet).