<p>M grams of steam at <span class="equation">\(100^oC \)</span>is mixed with 200 g of ice at its melting point in a thermally insulated container. If it produced liquid water at <span class="equation">\(40^oC \)</span>​​​​​​​[heat of vaporization of water is 540 cal/g and heat of fusion of ice is 80 cal/g] the value of M is ____</p>