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leetcode-cn/problem (Chinese)/字符串相乘 [multiply-strings].html Normal file
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<p>给定两个以字符串形式表示的非负整数&nbsp;<code>num1</code>&nbsp;和&nbsp;<code>num2</code>，返回&nbsp;<code>num1</code>&nbsp;和&nbsp;<code>num2</code>&nbsp;的乘积，它们的乘积也表示为字符串形式。</p>
<p><strong>注意：</strong>不能使用任何内置的 BigInteger 库或直接将输入转换为整数。</p>
<p>&nbsp;</p>
<p><strong>示例 1:</strong></p>
<pre>
<strong>输入:</strong> num1 = "2", num2 = "3"
<strong>输出:</strong> "6"</pre>
<p><strong>示例&nbsp;2:</strong></p>
<pre>
<strong>输入:</strong> num1 = "123", num2 = "456"
<strong>输出:</strong> "56088"</pre>
<p>&nbsp;</p>
<p><strong>提示：</strong></p>
<ul>
<li><code>1 &lt;= num1.length, num2.length &lt;= 200</code></li>
<li><code>num1</code>&nbsp;和 <code>num2</code>&nbsp;只能由数字组成。</li>
<li><code>num1</code>&nbsp;和 <code>num2</code>&nbsp;都不包含任何前导零，除了数字0本身。</li>
</ul>