* Kilograms to grams: There are 1000 grams in 1 kilogram, so 60 kilograms is equal to 60 * 1000 = 60,000 grams.

* Grams to nanograms: There are 1,000,000,000 (one billion) nanograms in 1 gram. So, 60,000 grams is equal to 60,000 * 1,000,000,000 = 60,000,000,000,000 nanograms.

Therefore, there are 60,000,000,000,000 nanograms in 60 kilograms.