A solid wooden block with a uniform cross section is floating in...

A solid wooden block with a uniform cross section is floating in water (density $\rho_{\mathrm{w}}$ ) with a height $h_1$ below water. Now a flat slab of stone is placed over the wooden block but the block still floats with a height $h_2$ below water. Afterwards the stone is removed from the top and pasted at the bottom of the wooden block. The wooden block now floats with a height $h_3$ under water. Therefore, the density of the stone is