Stoichiometry of a reaction

[MorQQ]

1. The problem statement, all variables and given/known data

sulfuric acid dissolves aluminum metal according to
2 Al(s) + 3 H2SO4 ---- Al2(SO4)3 (aq) + 3 H2

find minimum mass of H2SO4 in g if you wanted to dissolved aluminum block with mass of 15.2 g
2. Relevant equations

see above

3. The attempt at a solution
15.2 g Al x 1/26.98g x im confused about molar ratios what do i use? x 98.09 g H2So4

could someone help me with molar ratios i dont understand what to multiply by

[Borek]

Look at the reaction equation - how many moles of acid needed for 2 moles of aluminum?