If dividing 22.581 g by 22.4 ml = 1.00763392. Since 1.00763392 is the density how do i round that number and find out the number of significant figures too use for the answer density?

Given the following information: mass of proton = 1.00728 amu mass of neutron = 1.00866 amu mass of electron = 5.486 × 10^-4 amu speed of light = 2.9979 × 10^8 m/s calculate the nuclear binding energy (absolute value) of 3li^6. which has an atomic mass of 6.015126 amu. j/mol.