The data is from Finance ministry India website . The tool used ( plain old Excel)

OP, I can’t get past your misplaced commas. Is the UK amount 125 thousand, eight hundred thirty four? That’s 125,834, not 1,25,834.

By default my system gets the formatting using the Indian system. Which is 00,00,000 . In the above case One Lakh, twenty five thousand , eight hundred and thirty four crores.

The comma's are not misplaced. OP is from India thus he uses the indian way. Wikipedia Link So yes the UK amount is 125,834 but just seperate in another way than some might be used to.

In India we are taught to put commas after 3,2,2 digits.

This is because the units we use are thousand-lakh-crore-billion instead of thousand-million-billion.