Chemistry question: what is the mass, in grams, of a sample of 6.12 × 1024 atoms of manganese (mn)?

6.12x10^24 atoms x 1 mol/6.02x10^23 atoms = 10.166 rounded to 10.2
10.2 mol x 54.9380g/1 mol = 558.505 = 559g

i was just wondering if i rounded to high to get the right amount of sig figs? is my answer correct or should i change it?